Here, wind already is the cheapest source of power. The situation can very well become a reality in other parts of the world too as wind turbines are becoming more and more profitable, even without subsidies.
This doesn't represent good news for all the industries though. Coal miners companies such as Arch Coal, Peabody Energy Co, Rio Tinto Energy America and many others should see what's happening as a threat.
It's indeed nice to see a change in US energy investment, especially as gas prices are expected to go high in the near future. Analysts even believe that this might lead to an economy boost since it gives more buying power to the average working class. Companies such as Vestas Wind Systems, General Electric Co. and Siemens will definitely profit from how the wind industry is evolving. By 2020 it is expected that wind power will become competitive in most windy areas from around the United States.